Input and output geometry in python component

Hi masterminds,

I am working on a seemingly simple re-organising algorithm - it uses a list of 'Referenced Polyline Curves' from grasshopper, and outputs the same curves in a certain tree structure.

Problem is that the curves are not read as curves, but as strings. I have put the input on 'Tree Access' and type in on 'ghdoc Object when geometry'. This is the grasshopper context, and the code where I translate the tree to an array:

aTree in this case is the tree from the 'floors' input.

Do I also need to specify a type in the code somewhere?